72645621402103 has 2 divisors, whose sum is σ = 72645621402104. Its totient is φ = 72645621402102.

The previous prime is 72645621402017. The next prime is 72645621402121. The reversal of 72645621402103 is 30120412654627.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72645621402103 is a prime.

It is a super-2 number, since 2×72645621402103² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72645621402103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72645621402503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36322810701051 + 36322810701052.

It is an arithmetic number, because the mean of its divisors is an integer number (36322810701052).

Almost surely, 2^{72645621402103} is an apocalyptic number.

72645621402103 is a deficient number, since it is larger than the sum of its proper divisors (1).

72645621402103 is an equidigital number, since it uses as much as digits as its factorization.

72645621402103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 72645621402103 in words is "seventy-two trillion, six hundred forty-five billion, six hundred twenty-one million, four hundred two thousand, one hundred three".